The CT25664AA800.M16FH Crucial 2GB PC2-6400 DDR2-800MHz non-ECC Unbuffered CL6 240-P is a memory module specifically designed for computers that require DDR2 SDRAM memory. With a total capacity of 2GB per module, this memory module is perfect for upgrading or replacing existing memory modules in order to improve the overall performance of a computer. The PC2-6400 bus speed ensures fast and efficient data transfer, making it ideal for demanding computing tasks such as gaming, multimedia editing, or multitasking. Crucial is a trusted brand known for producing high-quality memory modules, making this product a reliable choice for enhancing a computer's memory capacity.